You're welcome, glad it's useful.

More than happy to chime in on the revised one - keep us updated as there are lots of members much better with the electronics than me :)

I used MS Visio. I tried lots of bits of software trying to find something I liked and it took a long time, seems lots of dedicated electronics layout software packages were missing the ability to choose wire colours and simple stuff like that. Visio is quite similar to PowerPoint so relatively simple to use, but still took a long time to get a diagram that I liked.